Answers

2014-10-14T21:50:14+08:00
DISCRIMINANT OF A QUADRATIC EQUATION

DISCRIMINANT is the name given to the expression,that appears under the root (radical) sign in quadratic formula.
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2014-10-14T22:48:43+08:00
B² - 4ac is the discriminant of the quadratic equation
it will determine whether or not the roots are real or imaginary
when:
    b² - 4ac > 0, roots are real and unequal
    b² - 4ac < 0, roots are complex 
    b² - 4ac = 0, roots are real and equal
    b² - 4ac < 0 and b=0, roots are purely imaginary
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